Re: LibPATA code issues / 2.6.15.4

[Justin Piszcz <jpiszcz@lucidpixels.com>]

On Fri, 7 Jul 2006, Mark Lord wrote:

> Justin Piszcz wrote:
> > Look at this:
> >
> > > From smartctl, look at the correspondence:
> > 199 UDMA_CRC_Error_Count    0x000a   200   253   000    Old_age   Always
> > -       4
> >
> > [4301946.802000] ata4: translated ATA stat/err 0x51/04 to SCSI
> > SK/ASC/ASCQ 0xb/00/00
> > [4301946.802000] ata4: status=0x51 { DriveReady SeekComplete Error }
> > [4301946.802000] ata4: error=0x04 { DriveStatusError }
> > [4302380.482000] ata4: translated ATA stat/err 0x51/04 to SCSI
> > SK/ASC/ASCQ 0xb/00/00
> > [4302380.482000] ata4: status=0x51 { DriveReady SeekComplete Error }
> > [4302380.482000] ata4: error=0x04 { DriveStatusError }
> > [4302493.664000] ata4: no sense translation for status: 0x51
> > [4302493.664000] ata4: translated ATA stat/err 0x51/00 to SCSI
> > SK/ASC/ASCQ 0xb/00/00
> > [4302493.664000] ata4: status=0x51 { DriveReady SeekComplete Error }
> > [4302863.673000] ata4: no sense translation for status: 0x51
> > [4302863.673000] ata4: translated ATA stat/err 0x51/00 to SCSI
> > SK/ASC/ASCQ 0xb/00/00
> > [4302863.673000] ata4: status=0x51 { DriveReady SeekComplete Error }
> >
> > different drive, different cable, same controller, but second port
> >
> > So that Stat/err = UDMA_CRC_Error_Count!
>
> No, I don't think it is -- there's a bit in the drive status
> for indicating CRC errors, and it is not showing up here.
>
> I think it's still just libata sending some command that this
> drive does not implement.  You really need to dump out the failed
> ATA opcode.
>
> I *think* this (uncompiled, untested) patch may do it for you on 2.6.16/17:
>
> --- linux/drivers/scsi/libata-scsi.c.orig	2006-06-19 10:37:03.000000000 -0400
> +++ linux/drivers/scsi/libata-scsi.c	2006-07-07 09:06:57.000000000 -0400
> @@ -542,6 +542,7 @@
> 	struct ata_taskfile *tf = &qc->tf;
> 	unsigned char *sb = cmd->sense_buffer;
> 	unsigned char *desc = sb + 8;
> +	unsigned char ata_op = tf->command;
>
> 	memset(sb, 0, SCSI_SENSE_BUFFERSIZE);
>
> @@ -558,6 +559,7 @@
> 	 * onto sense key, asc & ascq.
> 	 */
> 	if (tf->command & (ATA_BUSY | ATA_DF | ATA_ERR | ATA_DRQ)) {
> +		printk(KERN_WARN "ata_gen_ata_desc_sense: failed ata_op=0x%02x\n", ata_op);
> 		ata_to_sense_error(qc->ap->id, tf->command, tf->feature,
> 				   &sb[1], &sb[2], &sb[3]);
> 		sb[1] &= 0x0f;

had to change

KERN_WARN -> KERN_WARNING

then more errors

the patch never worked for me even when I had gotten it to work in
2.6.15.4, it never showed me what I wanted to see

drivers/scsi/libata-scsi.c: In function 'ata_gen_fixed_sense':
drivers/scsi/libata-scsi.c:638: error: 'ata_op' undeclared (first use in
this function)
drivers/scsi/libata-scsi.c:638: error: (Each undeclared identifier is
reported only once
drivers/scsi/libata-scsi.c:638: error: for each function it appears in.)
make[2]: *** [drivers/scsi/libata-scsi.o] Error 1

do you know who wrote the original patch?

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